Warm-air furnace



Pastas July 9, 1929.

. uann ICE.

ROY L. 'MEYERS, F JANESVILLE, WISCONSIN.

WARM-AIR FURNACE.

Application filed April 28, 1828.

This invention relates to improvements in a combustion chamber warm air furnaces.

It is one of the objects of the present 1nvention to provide a warm air furnace 1n which the air to be heated is circulated around the furnace combustion chamber and is also heated by the smoke and gases which are given a long course of travel so that waste heat. may be extracted therefrom.

A further object of the invention is to provide as a unitary apparatus, under one casing, a combined furnace and fuel economizer.

A further object of the invention is to provide a warm air furnace in which the combustion chamber is formed with an in clined and tapered upper end portion which serves to mutlie the noise of an oil burner used therein, and which also reflects the heat quickly. 0

A further object of the invention is to provide a heating apparatus of the class described which is compact and which will not occupy an undue amount of space.

A further object of the invention is to provide a warm air furnace which is eliicient in operation, is strong and durable, is of simple construction, and is well adapted for the purposes described.

Vfith the above and other objects in View, the invention consists of the improved warm air furnace, and its parts and combinations as set forth in the claims, and all equivalents thereof.

In the accompanying drawing in which the same reference characters indicate the same parts in all of the views:

Fig. 1 is a side view of the improved furnace with parts broken away and shown in section, the casing also being shown in vertical section;

Fig. 2 is a sectional View taken on line 2-2 of Fig. 1; and

Fig. 3 is a sectional view taken on line 33 of Fig. 1.

Referring nowmore particularly to the drawing, it will appear that the numeral 5 indicates an outer casing which encloses at one end thereof an oil burner casing 6 in the fire pot of which is mounted an oil burner 7. The fire pot is formed with an opening 8 and a flange or collar 9 is provided thereadjacent which extends through the end of the outer casing 5. Said opening 8 affords access to the fire pot and oil burner. Extending upwardly from the fire pot is tubes 19, while the lower Serial No. 273,720.

10 which is forwardly inclined as shown in Fig. l.

A fan shaped drum 11 is mounted above the combustion chamber 10 and in connnunication therewith and collects gases and smoke from the latter. An opening is pro vided in the outer face of the drum from which a collar 12 projects outwardly through the casing 5, the outer end portion of the collar being normally closed by means of a removable cover 13.

Extending into the other face of the drum 1]. are the end portions of a plurality of elongated smoke tubes 14. The other end portions of said tubes 14: enter the upper portion of a large vertically disposed drum 15 within the other end portion of the easing 5. The large drum 15 is supported by legs 16 and spaced therefrom, below the smoke tubes 14 and adj acent'the'rear of the oil burner casing G, is an. intermediate drum 1? also supported by legs 18. The upper portion of the drum 17 is connected with an intermediate portion of the drum 15 by a plurality of short intermediate smoke end portions of both of said drums are connected by a plurality of short lower smoke tubes 20. VVithin the lower portion of the drum 15, between the groups of tubes 19 and 20, there is a horizontal, transverse bafile or partition 21. The drum 15 has a clean-out extension or collar 12 and the outer end of the same is closed by a removable cover 18.

A chimney smoke pipe 22 is extended through the outer casing 5 and enters the upper port-ion of the large drum 15. Also there is a curved smoke pipe 23 extended between the lower portion of said drum and the pipe 22, communicating with both of the same. lVithin the pipe 22, adjacent the drum 15, there is a weighted valve or damper 24. which is normally closed, but if an explosion should occur within the furnace, the pressure will force said damper open to short circuit the gases.

A cold air supply pipe 25 enters the lower portion of the outer casing 5 and any number of warm air pipes 26 extend from the upper portion of said casing. Each of said pipes 26 connects with a register (not shown) for heating purposes.

In the operation of the. improved warm air furnace, smoke and gases pass from the drum 1.1 through the tubes 14- and into the drum '15. i

The battle 21 causes a return movement of the hot smoke through the tubes 19 to the drum 17 and then back to the drum 15 through the lower tubes 20. From here the smoke, from which heat has been extracted, is permitted to pass to the chimney through the smoke pipes 23 and 22.

' Cold air enters the lower portion of the outer casing 5 and circulates freely, in rising, adjacent the hot casing 6, all of the smoke tubes, the combustion chamber 10 and the drums. The long course of travel given to the hot smoke insures a maximum extraction of heat therefrom before its discharge to the chimney, Also, by the time the air reaches the hot air conducting pipes 26, it is very thoroughly heated.

As mentioned, the combustion chamber 10 is upwardly inclined and tapered. This arrangement serves to muffle the burner noises and also quickly reflects the heat; The removable cover 18 for the clean out extension 12 permits access to the drum 11 and tubes 14 to clean soot and deposits therefrom.

From the foregoing description, it will be seen that the improved warm air furnace is of simple and novel construction. and is well adapted for the purposes described.

What I claim as my invention is:

l. A furnace, comprising an .inner combustion'ca-sing, a small drum thereabove and connected with the upper portion thereof and having outlets, a large drum spaced from said combustion casing and extending below the small drum outlets, an intermediate drum between said other drums, a plurality of up per smoke tubes connecting the small drum, outlets with the upper portion of the large drum, a plurality of intermediate smoke tubes connecting the upper portion of the in termediate drum with an intermediate portion of'the large drum, a plurality of lower smoke tubes connecting the lower portion of the large drum and the intermediate drum, a. battle within the large drum below the openings of the intermediate smoke tubes, an outer casing enclosing all of the aforementioned members, a smoke pipe extending outwardly of the outer casing from the lower portion of the large drum at a point considerably below the inlet to the small drum,

a cold air supply pipe entering the lower portion of the outer casing, and a hot air pipe extending from an upper portion of the outer casing.

2. A furnace, comprising an inner combustion casing, a small drum thereabove and connected with the upper portion thereof and having outlets, a large drum spaced from said combustion casing and extending below the small drum outlets, an intermediate drum between said other drums, a plurality of elongated upper smoke tubes connecting the small drum outlets with the upper'portion of the large drum, a plurality of intermediate short smoke tubes connecting the upper portion of the intermediate drum with an intermediate portion of the large drum, a plurality of lower smoke tubes connecting the lower portions of the large drum and the intermediate drum, all of said smoke tubes being horizontally disposed, a baliie within the large drum below the openings of the intermediate smoke tubes, an outer casing enclosing all of the aforementioned members, a smoke pipe extending outwardly of the outer casing from the lower portion of the large drum at a point considerably below the inlet to the small drum, a cold air supply pipe entering the lower portion of the outer using, and a hot air pipe extending from an upper portion of the outer casing.

A furnace, comprising an inner combustion casing, a small drum ihereabov! and connected with the upper portion thereof and having outlets, a large drum spaced from said combustion casing and extending below the small drum outlet, an intermediate drum between said other drums, a plurality of upper smoke tubes connecting the small drum outlets with the upper portion of the large drum, a plurality of intermediate smoke tubes connecting the upper portion of the intermediate drum with an intermediate portion of the large drum, a pluality of lower smoke tubes connecting the lower portions of the large drum and the intermediate drum, a baille within the large drum below the openings of the intermediate smoke tubes, an outer casing enclosing all of the aforementioned members, a smoke pipe extending outwardly of the outer casing from the lower portion of the large drum at a point considerably below the inlet to the small drum, a short circuiting smoke pipe extending exteriorly of the outor casing from the upper portion of said large drum and connecting with said first mentioned smoke pipe exteriorly of the casing, a weighted valve within said short circuiting smoke pipe, a cold air supply pipe entering the lower portion of the outer casing, and a hot air pipe extending from an upper portion of the outer casing.

4. A furnace, comprising an inner furnace casing having an upwardly flared, angularly extending upper portion forming a combustion chamber, a small drum mounted immediately above and in communication with said tapered upper casing portion and having outlets, a large drum spaced from said furnace casing and extending below the small drum outlets, an intermediate drum between said other drums, a plurality of upper smoke tubes connecting the small drum with the upper portion of the large drum, a plurality of intermediate smoke tubes connecting the upper portion of the intermediate drum with an intermediate portion of the large drum, a plurality of lower smoke tubes connecting the lower portions of the large drum and the intermediate drum, a battle within the large drum below the openings of the intermediate smoke tubes, an outer casing enclosing all of the aforementioned members, a smoke pipe extending outwardly of the outer casing from the lower portion of the large drum at a point considerably below the in let to the small drum, a cold air supply pipe entering the lower portion of the outer casing, and a hot air pipe extending from an upper portion of the outer casing.

5. A furnace, comprising an. inner combustion casing having an upwardly flared andinclined upper end portion, a tan shaped drum having side outlets mounted thereabove and in register with said upper end portion, a large drum spaced from said combustion casing and extending below said fan shaped drum outlets, an intermediate drum between said other drums, a plurality of elongated upper smoke tubes connecting the fan shaped drum outlets with the upper portion of the large drum, a plurality of intermediate short smoke tubes connecting the upper portion of the intermediate drum with an intermediate portion of the large drum, a plurality of lower smoke tubes connecting the lower portions of the large drum and the intermediate drum, all of said smoke tubes being horizontally disposed, a battle within the large drum below the openings of the intermediate smoke tubes, an outer casing enclosing all of the aforementioned members, a smoke pipe extending outwardly of the outer casing from the lowor portion of the large drum at a point considerably below the inlet to the fan shaped drum, a short-circuiting smoke pipe extending exteriorly of the outer casing from the upper portion of said large drum and connecting with said first mentioned smoke pipe exteriorly ol' the casing, a normally closed valve within said short circuiting smoke pipe, a cold air supply pipe entering the lower portion 01 the outer casing, and a hot air pipe extending from an upper portion of the outer casing.

6. A furnace, comprising an outer casing, a combustion casing therewithin and having an upper portion with a smoke outlet there in, a smoke drum laterally spaced from the upper portion of the combustion casing and extending below the smoke outlet of the same, connected smoke tubes extending back and forth from said smoke outlet to a lower portion of said drum and making connections with said smoke outlet and with said drum, the smoke tube connections with said smoke outlet and with said drum being diagonally opposed, a smoke exhaust pipe extending from said drum exteriorly of the outer casing and from a point considerably below the smoke outlet of the combustion casing, a cold air pipe entering the lower portion of the outer casing, and a warm air pipe extending from the upper portion of the outer casing.

In testimony whereof, I atfix my signature.

' ROY L. M'nYnRs. 

